A series of lunar occultations of the galactic center region is being observed with the 140 foot telescope at Green Bank, West Virginia. In line observations, main interest lies in the fine structure of the absorbing clouds of OH or HI in front of the continuum sources near the center. The +40 km/sec component of the OH absorption spectrum is found to originate in a cloud of dimensions 3' x 5', which appears to rotate as a uniform body. Internal structure has been detected in the -130 km/sec component of the order of 30” . The results for the 1665 and 1667 MHz lines are significantly different. This paper has now been published in Astrophysical Letters, 2 , 195 - 200 (1968).